function out =fal_75_01(x)
Zoom = 50;
x = x*Zoom;
k0 = 3.1622777;                                          
x1 = 0.01;   y1 = 0.03162277;    
x2 = 0.03;   y2 = 0.07208434;
x3 = 0.07;   y3 = 0.13608915;
x4 = 0.16;   y4 = 0.25298221;
x5 = 0.32;   y5 = 0.42546367;
x6 = 0.57;   y6 = 0.65600347;
x7 = 1;      y7 = 1.00000000;
x8 = 2;      y8 = 1.68179283;
x9 = 10;     y9 = 5.62341325;

k1 = (y2-y1)/(x2-x1);
k2 = (y3-y2)/(x3-x2);
k3 = (y4-y3)/(x4-x3);
k4 = (y5-y4)/(x5-x4);
k5 = (y6-y5)/(x6-x5);
k6 = (y7-y6)/(x7-x6);
k7 = (y8-y7)/(x8-x7);
k8 = (y9-y8)/(x9-x8);

b1 = y1 - k1*x1;
b2 = y2 - k2*x2;
b3 = y3 - k3*x3;
b4 = y4 - k4*x4;
b5 = y5 - k5*x5;
b6 = y6 - k6*x6;
b7 = y7 - k7*x7;
b8 = y8 - k8*x8;


t=abs(x);
    if t<x1
        y=k0*t;
    elseif t<x2
            y= k1*t+b1;
    elseif t<x3         
            y= k2*t+b2;
    elseif t<x4         
            y= k3*t+b3;
    elseif t<x5
            y= k4*t+b4;
    elseif t<x6         
            y= k5*t+b5;
    elseif t<x7         
            y= k6*t+b6;    
    elseif t<x8   
            y= k7*t+b7;
    else
            y= k8*t+b8;        
    end


out = y/Zoom*sign(x);